Hi
This is one way that should work:
u[i_]:=ToExpression["u"<>ToString[i]]
will convert your u[i] expressions to ui, that is u[2] will be changed to u2.
Hope that helps.
RF
At 01:36 AM 6/26/97 -0400, you wrote:
>I'm not serious programmer in Mma, so please excuse me if this is question is
>not stated as clearly as it could be.
>
>My problem is that I wish to use a Mma package called MultiplierMethod.m which
>implements a version of Kuhn-Tucker constrained optimization. The package
>defines the function MultiplierMethod[] as follows:
>
>"MultiplierMethod[f,g,h,x,x0] finds a local solution to a minimization \
>problem where: f is the criterion to be minimized, g is the list (possibly \
>empty) of equality constraints, h is the list (possibly empty) of inequality \
>constraints of the form h(x) <= 0, x = {x1,x2,...} is a generic list of the \
>variables, x0 is an initial vector for x. It returns a list {f*,{x1 -> x1*, \
>etc.}} like FindMinimum. With the option DualParameter -> True it can also \
>provide information on feasibility and Lagrange and/or Karush Kuhn & Tucker \
>multipliers."
>
>Here's my problem: I'd like to use constraint lists such as
>{u[2]-2*u[1]+u[0],u[3]-2*u[2]+u[1],...} which are easily constructed using
>Table[], but the MultiplierMehtod package will not accept u[0], u[1], [2],
etc.
>as variables. It will except u0, u1, u2, etc. as variables, however. Is
there
>a simple way to get indexed variables such as u[i] to be accepted by packages
>such as MultiplierMethod?
>
>I've already spent an afternoon working on this. Many thanks to anyone who
can
>help.
>